The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 25, 2001
Filed:
Jan. 03, 2001
Applicant:
Inventors:
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 2/1205 ; H01L 2/168 ;
U.S. Cl.
CPC ...
H01L 2/1205 ; H01L 2/168 ;
Abstract
A heater comprising a substrate having a heating surface to treat a substance to be heated on the substrate, a heating element embedded in the substrate, and a resistance control part, wherein the substrate comprises a first ceramic material and the resistance control part comprises a second ceramic material which has higher volume resistivity than that of the first ceramics.